<template>
  <div class="xtx-numbox">
    <div class="label">数量</div>
    <div class="numbox">
      <a href="javascript:;" @click="change(-1)">-</a>
      <input type="text" readonly :value="val" />
      <a href="javascript:;" @click="change(1)">+</a>
    </div>
  </div>
</template>
<script setup>
import { ref, defineEmits, defineProps, watch } from 'vue'
const emit = defineEmits(['update:modelValue'])
const props = defineProps({
  modelValue: {
    type: Number,
    default: 1
  }
})
// 加一减一功能
const val = ref(1)
const change = (item) => {
  if (val.value === 1 && item === -1) {
    return
  }
  val.value += item
  emit('update:modelValue', val.value)
}

watch(
  () => {
    props.modelValue
  },
  () => {
    val.value = props.modelValue
  },
  {
    immediate: true
  }
)
</script>
<style scoped lang="less">
.xtx-numbox {
  display: flex;
  align-items: center;
  .label {
    width: 60px;
    color: #999;
    padding-left: 10px;
  }
  .numbox {
    width: 120px;
    height: 30px;
    border: 1px solid #e4e4e4;
    display: flex;
    > a {
      width: 29px;
      line-height: 28px;
      text-align: center;
      background: #f8f8f8;
      font-size: 16px;
      color: #666;
      &:first-of-type {
        border-right: 1px solid #e4e4e4;
      }
      &:last-of-type {
        border-left: 1px solid #e4e4e4;
      }
    }
    > input {
      width: 60px;
      padding: 0 5px;
      text-align: center;
      color: #666;
    }
  }
}
</style>
